package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
   private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
//清空购物车
    @Override
    public void deleteall() {
        //获取用户id
        Long userId=BaseContext.getCurrentId();
       shoppingCartMapper.deleteall(userId);

    }
//点餐
    @Override
    public void addshoppcart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //获取用户Id
         Long userId=BaseContext.getCurrentId();
         shoppingCart.setUserId(userId);

        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        //判断菜品是否存在
        if(list!=null  &&  list.size()>0){
            //如果存在
        ShoppingCart cart=list.get(0);
        cart.setNumber(cart.getNumber()+1);
               shoppingCartMapper.shoppcartunmberId(cart);
        } else{
         //如果不存在，需要输入一条购物车数据

            //判断本次添加的是购物车还是套餐
            Long dishId=shoppingCartDTO.getDishId();
            if(dishId!=null){
                //本次添加的是菜品
                Dish dish=dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());

            }else{
                //本次添加到购物车的是套餐
                Long setmealId = shoppingCart.getSetmealId();
                Setmeal setmeal=setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }

            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.inset(shoppingCart);

        }


    }

    @Override
    public List<ShoppingCart> select() {
       Long userid= BaseContext.getCurrentId();
          ShoppingCart shoppingCart=ShoppingCart.builder().
                  userId(userid)
                  .build();
        List<ShoppingCart>  list=shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void delete(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //设置查询条件，查询当前登录用户的购物车数据
        Long userId=BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        List<ShoppingCart>list=shoppingCartMapper.list(shoppingCart);

        if(list != null && list.size() > 0){
        /*    shoppingCart.setNumber(shoppingCart.getNumber()-1);
        }else {
            shoppingCartMapper.delete(shoppingCart);
        }*/
            // 取出列表中唯一的购物车记录（因为同一用户+同一商品只有1条记录）
            shoppingCart = list.get(0);

            Integer number = shoppingCart.getNumber();
            if(number == 1){
                //当前商品在购物车中的份数为1，直接删除当前记录
                shoppingCartMapper.deleteall(shoppingCart.getId());
            }else {
                //当前商品在购物车中的份数不为1，修改份数即可
                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
                shoppingCartMapper.shoppcartunmberId(shoppingCart);
            }
        }
    }


}
